Combined rotary impulse sprinkler head and shut-off valve

Abstract

A sprinkler head assembly rotatable about a generally vertically extending axis, an impulse arm operable in response to the flow of water under pressure for effecting progressive movements of the sprinkler body about said axis, an outwardly facing annular valve seat on the sprinkler body disposed in surrounding relation to the outlet, a poppet valve cooperable with the annular valve seat, a mounting assembly for mounting the poppet valve on the sprinkler body for movement exteriorly of the sprinkler body (1) from an open position disposed out of the path of the stream progressively through the stream and generally inwardly onto the outwardly facing annular valve seat into a closed position with respect to the outlet so as to contain water under pressure within the sprinkler body and prevent flow thereof outwardly of the outlet beyond the annular valve seat and (2) from the closed position generally outwardly from the outwardly facing valve seat and progressively out of the stream into the open position, and an actuator for effecting movement of the poppet valve from the open position into the closed position while the sprinkler body is communicated with the source of water under pressure and the water under pressure is flowing through the sprinkler body outwardly of the outlet and from the closed position into the open position.

What is claimed is: 
     
       1. A sprinkler head comprising: a sprinkler body having an inlet and an outlet,   means adapted to be communicated with a source of water under pressure for communicating the same with said inlet and for mounting said sprinkler body for movement about a generally vertically extending axis so that water under pressure communicated with said inlet will flow through said sprinkler body and outwardly from the outlet thereof in a stream flowing in a generally upward and outward direction,   means operable in response to the aforesaid flow of water under pressure for effecting progressive movements of said sprinkler body about said axis,   means defining an outwardly facing annular valve seat on said sprinkler body disposed in surrounding relation to said outlet,   poppet valve means cooperable with said annular valve seat,   means mounting said poppet valve means on said sprinkler body for movement exteriorly of said sprinkler body (1) from an open position disposed out of the path of said stream progressively through said stream and generally inwardly onto said outwardly facing annular valve seat into a closed position with respect to said outlet so as to contain water under pressure within said sprinkler body and prevent flow thereof outwardly of said outlet beyond said annular valve seat and (2) from said closed position generally outwardly from said outwardly facing valve seat and progressively out of said stream into said open position,   means for effecting movement of said poppet valve means from said open position into said closed position while said sprinkler body is communicated with the source of water under pressure and the water under pressure is flowing through said sprinkler body outwardly of said outlet and from said closed position into said open position,   surface means on said poppet valve means operable during the progressive movement of said poppet valve means through said stream for engaging said stream and maintaining reaction forces created thereby generally free from resultant force components acting tangentially to said axis.   
     
     
       2. A sprinkler head as defined in claim 1 wherein said mounting means includes a mounting arm carrying said poppet valve means on one end thereof and pivot means spaced below and in a direction upstream from said outlet mounting said arm for pivotal movement about a horizontally extending axis. 
     
     
       3. A sprinkler head as defined in claim 2 wherein said movement effecting means comprises an actuator, a toggle linkage interconnected between said sprinkler body and an opposite end of said mounting arm and a connecting link interconnecting said actuator with the center of said toggle linkage. 
     
     
       4. A sprinkler head as defined in claim 3 wherein said actuator includes a housing fixed to said sprinkler body, said housing having a cylindrical chamber therein, a piston mounted within said chamber for generally reciprocating movement therein, means providing a peripheral seal for said piston within said chamber, conduit means connected with said chamber for directing a supply of fluid under pressure into said chamber so as to move said piston through a stroke corresponding to a movement of said poppet valve from its open position to its closed position. 
     
     
       5. A sprinkler head as defined in claim 4 wherein said actuator includes spring means for moving said piston through an opposite stroke when the pressure of the fluid within said chamber is relieved. 
     
     
       6. A sprinkler head as defined in claim 4 or 5 wherein said conduit means includes a conduit section fixed with respect to said sprinkler body mounting means and having a portion extending concentric with the vertical axis of rotation of said sprinkler body, said sprinkler body being rotatably sealingly connected with said conduit portion. 
     
     
       7. A sprinkler head as defined in claim 4 or 5 wherein said sealing means comprises a folded rolling sleeve having an outer portion engaging a cylindrical interior peripheral surface of said chamber and an inner portion engaging a cylindrical exterior peripheral surface of said piston spaced inwardly of the cylindrical interior peripheral surface of said chamber. 
     
     
       8. A sprinkler head as defined in claim 7 wherein said actuator includes a piston rod extending through said housing and connected exteriorly thereof with said connecting link, the interior end of said piston rod having a spring retainer thereon, said spring means comprising a coil spring surrounding the portion of said piston rod extending into said housing having one end engaging said spring retainer and the other end engaging said housing. 
     
     
       9. A sprinkler head as defined in claim 8 wherein the end portion of said piston rod extending within said housing is hollow and said piston includes an elongated guide element extending within the hollow end portion of said piston rod.